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1/*
2 * linux/mdio.h: definitions for MDIO (clause 45) transceivers
3 * Copyright 2006-2009 Solarflare Communications Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
8 */
9#ifndef __LINUX_MDIO_H__
10#define __LINUX_MDIO_H__
11
12#include <uapi/linux/mdio.h>
13
14
15static inline bool mdio_phy_id_is_c45(int phy_id)
16{
17 return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
18}
19
20static inline __u16 mdio_phy_id_prtad(int phy_id)
21{
22 return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
23}
24
25static inline __u16 mdio_phy_id_devad(int phy_id)
26{
27 return phy_id & MDIO_PHY_ID_DEVAD;
28}
29
30/**
31 * struct mdio_if_info - Ethernet controller MDIO interface
32 * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
33 * @mmds: Mask of MMDs expected to be present in the PHY. This must be
34 * non-zero unless @prtad = %MDIO_PRTAD_NONE.
35 * @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then
36 * MII register access will be passed through with @devad =
37 * %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to
38 * commonly used clause 22 registers will be translated into
39 * clause 45 registers.
40 * @dev: Net device structure
41 * @mdio_read: Register read function; returns value or negative error code
42 * @mdio_write: Register write function; returns 0 or negative error code
43 */
44struct mdio_if_info {
45 int prtad;
46 u32 mmds;
47 unsigned mode_support;
48
49 struct net_device *dev;
50 int (*mdio_read)(struct net_device *dev, int prtad, int devad,
51 u16 addr);
52 int (*mdio_write)(struct net_device *dev, int prtad, int devad,
53 u16 addr, u16 val);
54};
55
56#define MDIO_PRTAD_NONE (-1)
57#define MDIO_DEVAD_NONE (-1)
58#define MDIO_SUPPORTS_C22 1
59#define MDIO_SUPPORTS_C45 2
60#define MDIO_EMULATE_C22 4
61
62struct ethtool_cmd;
63struct ethtool_pauseparam;
64extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
65extern int mdio_set_flag(const struct mdio_if_info *mdio,
66 int prtad, int devad, u16 addr, int mask,
67 bool sense);
68extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
69extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
70extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
71 struct ethtool_cmd *ecmd,
72 u32 npage_adv, u32 npage_lpa);
73extern void
74mdio45_ethtool_spauseparam_an(const struct mdio_if_info *mdio,
75 const struct ethtool_pauseparam *ecmd);
76
77/**
78 * mdio45_ethtool_gset - get settings for ETHTOOL_GSET
79 * @mdio: MDIO interface
80 * @ecmd: Ethtool request structure
81 *
82 * Since the CSRs for auto-negotiation using next pages are not fully
83 * standardised, this function does not attempt to decode them. Use
84 * mdio45_ethtool_gset_npage() to specify advertisement bits from next
85 * pages.
86 */
87static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
88 struct ethtool_cmd *ecmd)
89{
90 mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
91}
92
93extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
94 struct mii_ioctl_data *mii_data, int cmd);
95
96/**
97 * mmd_eee_cap_to_ethtool_sup_t
98 * @eee_cap: value of the MMD EEE Capability register
99 *
100 * A small helper function that translates MMD EEE Capability (3.20) bits
101 * to ethtool supported settings.
102 */
103static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
104{
105 u32 supported = 0;
106
107 if (eee_cap & MDIO_EEE_100TX)
108 supported |= SUPPORTED_100baseT_Full;
109 if (eee_cap & MDIO_EEE_1000T)
110 supported |= SUPPORTED_1000baseT_Full;
111 if (eee_cap & MDIO_EEE_10GT)
112 supported |= SUPPORTED_10000baseT_Full;
113 if (eee_cap & MDIO_EEE_1000KX)
114 supported |= SUPPORTED_1000baseKX_Full;
115 if (eee_cap & MDIO_EEE_10GKX4)
116 supported |= SUPPORTED_10000baseKX4_Full;
117 if (eee_cap & MDIO_EEE_10GKR)
118 supported |= SUPPORTED_10000baseKR_Full;
119
120 return supported;
121}
122
123/**
124 * mmd_eee_adv_to_ethtool_adv_t
125 * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
126 *
127 * A small helper function that translates the MMD EEE Advertisment (7.60)
128 * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
129 * settings.
130 */
131static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
132{
133 u32 adv = 0;
134
135 if (eee_adv & MDIO_EEE_100TX)
136 adv |= ADVERTISED_100baseT_Full;
137 if (eee_adv & MDIO_EEE_1000T)
138 adv |= ADVERTISED_1000baseT_Full;
139 if (eee_adv & MDIO_EEE_10GT)
140 adv |= ADVERTISED_10000baseT_Full;
141 if (eee_adv & MDIO_EEE_1000KX)
142 adv |= ADVERTISED_1000baseKX_Full;
143 if (eee_adv & MDIO_EEE_10GKX4)
144 adv |= ADVERTISED_10000baseKX4_Full;
145 if (eee_adv & MDIO_EEE_10GKR)
146 adv |= ADVERTISED_10000baseKR_Full;
147
148 return adv;
149}
150
151/**
152 * ethtool_adv_to_mmd_eee_adv_t
153 * @adv: the ethtool advertisement settings
154 *
155 * A small helper function that translates ethtool advertisement settings
156 * to EEE advertisements for the MMD EEE Advertisement (7.60) and
157 * MMD EEE Link Partner Ability (7.61) registers.
158 */
159static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
160{
161 u16 reg = 0;
162
163 if (adv & ADVERTISED_100baseT_Full)
164 reg |= MDIO_EEE_100TX;
165 if (adv & ADVERTISED_1000baseT_Full)
166 reg |= MDIO_EEE_1000T;
167 if (adv & ADVERTISED_10000baseT_Full)
168 reg |= MDIO_EEE_10GT;
169 if (adv & ADVERTISED_1000baseKX_Full)
170 reg |= MDIO_EEE_1000KX;
171 if (adv & ADVERTISED_10000baseKX4_Full)
172 reg |= MDIO_EEE_10GKX4;
173 if (adv & ADVERTISED_10000baseKR_Full)
174 reg |= MDIO_EEE_10GKR;
175
176 return reg;
177}
178
179#endif /* __LINUX_MDIO_H__ */